Information Indication Apparatus and Method and Communication System

ABSTRACT

An information indication apparatus and method and a communication system. The information indication method includes: transmitting a plurality of physical broadcast channels and a plurality of synchronization signals at a plurality of time units or a plurality of time instances within a time interval; wherein, each of the physical broadcast channels carries timing information of the time interval. Hence, even a plurality of physical broadcast channels and a plurality of synchronization signals are transmitted at a plurality of time units or a plurality of time instances within a time interval, the timing information of the time interval may be obtained with a simple structure and operation.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation application of U.S. application Ser.No. 16/266,907, which was filed on Feb. 4, 2019 now pending, which is acontinuation application of International Application PCT/CN2016/094902filed on Aug. 12, 2016, the entire contents of which are incorporatedherein by reference.

TECHNICAL FIELD

This disclosure relates to the field of communication technologies, andin particular to an information indication apparatus and method and acommunication system.

BACKGROUND

For a high-frequency wireless communication system, such as a band of acentimeter wave or a millimeter wave, due to limitation of physicalpropagation features, wireless signals are attenuated very fast asincrease of distances. A fifth generation (5G) or new radio (NR) systemwill adopt such carriers higher than 6 GHz to constitute a cellularcommunication system. And how to improve coverage of a cell is achallenge.

Use of a multi-antenna technique for beamforming may greatly improve atransmission distance of a high-frequency radio wave. For example, useof a so-called massive multiple input multiple output (MIMO) techniquemay obtain more outstanding antenna gains.

By performing beamforming or precoding on data transmitted to a userequipment, a user equipment relatively far away from a base station isenabled to receive signals of sufficiently good quality, therebyimproving transmission distances of data signals. However, for thosesignals needing to be received by all user equipments within a cell,such as a system signal (or system information), a synchronizationsignal, a control signal, and a measurement signal related to radioresource management, etc., there exists a problem of wide coverage. Forthe convenience of description, such signals are referred to as cellsignals in brief.

After beamforming is used, different from a scheme of isotropic antenna,sufficiently strong signals can be received only in a direction to whicha beam directs. In order that all user equipments within a cell mayreliably receive cell signals, a manner of beam sweeping may be adopted.For the cell signals, the beamforming technique is adopted, so thatbeams are sequentially transmitted in different spatial directions at aplurality of time units within a time interval in a time-divisionmanner. Hence, the cell signals in this time interval may cover anexpected spatial range, such as the whole cell or the whole sector.

The synchronization signal is one of most important signals in the cellsignals, and is a necessary signal for a user equipment to access to thenetwork and move in the network. Seen from a frame structure, for along-term evolution (LTE) system or an LTE-advance system, only onesynchronization signal is transmitted at a certain time interval (suchas half a frame, 5 ms, or one frame, 10 ms), hence, a receiver maydetermine timing (such as frame timing) of the time interval accordingto a detected position of the synchronization signal.

It should be noted that the above description of the background ismerely provided for clear and complete explanation of this disclosureand for easy understanding by those skilled in the art. And it shouldnot be understood that the above technical solution is known to thoseskilled in the art as it is described in the background of thisdisclosure.

SUMMARY

However, it was found by the inventors that for example, when beamsweeping is used, the synchronization signal is possibly transmitted formultiple times at a plurality of time instances or a plurality of timeunits at a time interval (such as a subframe) by using a plurality ofbeams. Hence, after determining a position of the synchronization signalby using a detection algorithm, the receiver further needs to accuratelylearn a beam to which the synchronization signal corresponds, or needsto learn a time instance or a time unit to which the detectedsynchronization signal corresponds in the beam sweeping process. Only inthis way timing information of a time interval (such as a subframe orframe) can be further extrapolated.

For an NR system, synchronization signals may possibly be redesigned,and a new transmission time interval (TTI) type or name may possibly bedefined; however, for beam sweeping, all user equipments need to detectsynchronization signals and obtain a starting time instance of atransmission time interval.

And on the other hand, acquisition of the most important systeminformation is an important part of initial access. In the LTE system,master information block (MIB) information is carried in a physicalbroadcast channel, and includes information necessary for a terminal toaccess a network, such as a system frame number (SFN), and a systembandwidth, etc. A new physical broadcast channel may possibly bedesigned in the NR; however, if a synchronization signal adopts the beamsweeping manner, the physical broadcast channel will also adopt the samemanner in transmission.

Embodiments of this disclosure provide an information indicationapparatus and method and a communication system, in which even aplurality of physical broadcast channels and a plurality ofsynchronization signals are transmitted at a plurality of time units ora plurality of time instances within a time interval, the timinginformation of the time interval can be obtained with a simple structureand operation.

According to a first aspect of the embodiments of this disclosure, thereis provided an information indication method, applicable to atransmitting device, the information indication method including:

transmitting a plurality of physical broadcast channels and a pluralityof synchronization signals at a plurality of time units or a pluralityof time instances within a time interval; wherein, each of the physicalbroadcast channels carries timing information of the time interval.

According to a second aspect of the embodiments of this disclosure,there is provided an information indication apparatus, configured in atransmitting device, the information indication apparatus including:

an information transmitting portion configured to transmit a pluralityof physical broadcast channels and a plurality of synchronizationsignals at a plurality of time units or a plurality of time instanceswithin a time interval; wherein, each of the physical broadcast channelscarries timing information of the time interval.

According to a third aspect of the embodiments of this disclosure, thereis provided an information indication method, applicable to a receivingdevice, the information indication method including:

detecting synchronization signals transmitted by a transmitting device;wherein, the transmitting device transmits a plurality of physicalbroadcast channels and a plurality of synchronization signals at aplurality of time units or a plurality of time instances within a timeinterval, and each of the physical broadcast channels carries timinginformation of the time interval;

receiving corresponding physical broadcast channels according to thedetected synchronization signals; and

obtaining the timing information of the time interval carried by thephysical broadcast channel.

According to a fourth aspect of the embodiments of this disclosure,there is provided an information indication apparatus, configured in areceiving device, the information indication apparatus including:

a synchronization signal detecting portion configured to detectsynchronization signals transmitted by a transmitting device; wherein,the transmitting device transmits a plurality of physical broadcastchannels and a plurality of synchronization signals at a plurality oftime units or a plurality of time instances within a time interval, andeach of the physical broadcast channels carries timing information ofthe time interval;

an information receiving portion configured to receive correspondingphysical broadcast channels according to detected synchronizationsignals; and

a timing obtaining portion configured to obtain the timing informationof the time interval carried by the physical broadcast channel.

According to a fifth aspect of the embodiments of this disclosure, thereis provided a communication system, including:

a transmitting device configured to transmit a plurality of physicalbroadcast channels and a plurality of synchronization signals at aplurality of time units or a plurality of time instances within a timeinterval; wherein, each of the physical broadcast channels carriestiming information of the time interval; and

a receiving device configured to detect the synchronization signalstransmitted by the transmitting device, receive corresponding physicalbroadcast channels according to detected synchronization signals, andobtain the timing information of the time interval carried by thephysical broadcast channel.

An advantage of the embodiments of this disclosure exists in that aplurality of physical broadcast channels and a plurality ofsynchronization signals are transmitted at a plurality of time units ora plurality of time instances within a time interval; each of thephysical broadcast channels carries timing information of the timeinterval. Hence, even a plurality of physical broadcast channels and aplurality of synchronization signals are transmitted at a plurality oftime units or a plurality of time instances within a time interval, thetiming information of the time interval may be obtained with a simplestructure and operation.

With reference to the following description and drawings, the particularembodiments of this disclosure are disclosed in detail, and theprinciple of this disclosure and the manners of use are indicated. Itshould be understood that the scope of the embodiments of thisdisclosure is not limited thereto. The embodiments of this disclosurecontain many alternations, modifications and equivalents within thescope of the terms of the appended claims.

Features that are described and/or illustrated with respect to oneembodiment may be used in the same way or in a similar way in one ormore other embodiments and/or in combination with or instead of thefeatures of the other embodiments.

It should be emphasized that the term “comprise/include” when used inthis specification is taken to specify the presence of stated features,integers, steps or components but does not preclude the presence oraddition of one or more other features, integers, steps, components orgroups thereof

BRIEF DESCRIPTION OF THE DRAWINGS

Elements and features depicted in one drawing or embodiment of thedisclosure may be combined with elements and features depicted in one ormore additional drawings or embodiments. Moreover, in the drawings, likereference numerals assign corresponding parts throughout the severalviews and may be used to assign like or similar parts in more than oneembodiment.

FIG. 1 is a schematic diagram of a structure of a frame in an LTE/LTE-Asystem;

FIG. 2 is a schematic diagram of transmitting a PBCH or asynchronization signal in the LTE/LTE-A system;

FIG. 3 is a schematic diagram of transmitting beams in a beamformingsystem;

FIG. 4 is a schematic diagram of transmitting PBCHs or synchronizationsignals in the beamforming system;

FIG. 5 is a schematic diagram of the information indication method ofEmbodiment 1 of this disclosure;

FIG. 6 is a schematic diagram of transmitting physical broadcastchannels and/or synchronization signals in the embodiment of thisdisclosure;

FIG. 7 is another schematic diagram of transmitting physical broadcastchannels and/or synchronization signals in the embodiment of thisdisclosure;

FIG. 8 is another schematic diagram of the information indication methodof Embodiment 1 of this disclosure;

FIG. 9 is a schematic diagram of physical broadcast channels andsynchronization signals having identical time intervals in Embodiment 1of this disclosure;

FIG. 10 is a schematic diagram of using a predetermined temporalrelationship in Embodiment 1 of this disclosure;

FIG. 11 is a schematic diagram of a plurality of physical broadcastchannels and a plurality of synchronization signals having differenttime intervals in Embodiment 1 of this disclosure;

FIG. 12 is a schematic diagram of the timing information of the timeinterval that is explicitly carried in Embodiment 1 of this disclosure;

FIG. 13 is another schematic diagram of the timing information of thetime interval that is explicitly carried in Embodiment 1 of thisdisclosure;

FIG. 14 is a schematic diagram of the information indication method ofEmbodiment 3 of this disclosure;

FIG. 15 is a schematic diagram of the information indication apparatusof Embodiment 4 of this disclosure;

FIG. 16 is a schematic diagram of the information indication apparatusof Embodiment 5 of this disclosure;

FIG. 17 is a schematic diagram of the communication system of Embodiment6 of this disclosure;

FIG. 18 is a schematic diagram of the base station of Embodiment 6 ofthis disclosure; and

FIG. 19 is a schematic diagram of the user equipment of Embodiment 6 ofthis disclosure.

DETAILED DESCRIPTION

These and further aspects and features of the present disclosure will beapparent with reference to the following description and attacheddrawings. In the description and drawings, particular embodiments of thedisclosure have been disclosed in detail as being indicative of some ofthe ways in which the principles of the disclosure may be employed, butit is understood that the disclosure is not limited correspondingly inscope. Rather, the disclosure includes all changes, modifications andequivalents coming within the terms of the appended claims.

In this disclosure, a base station may be referred to as an accesspoint, a broadcast transmitter, a transmission reception point (TRP), anode B, or an evolved node B (eNB), etc., and may include some or allfunctions of them. A term “base station” shall be used in the text, andeach base station provides communication coverage for a specificgeographical region. And a term “cell” may refer to a base stationand/or its coverage area, which is dependent on a context of the term.

In this disclosure, a mobile station or equipment may be referred to asa user equipment (UE). The UE may be fixed or mobile, and may also bereferred to as a mobile station, a terminal, an access terminal, a userunit, or a station, etc. The UE may be a cellular phone, a personaldigital assistant (PDA), a wireless modem, a wireless communicationdevice, a handhold device, a machine type communication device, alap-top computer, and a cordless telephone, etc.

In an LTE/LTE-A system, a UE may obtain slot timing by detecting aprimary synchronization signal (PSS), and obtain frame timing bydetecting a secondary synchronization signal (SSS). Based on the slottiming and the frame timing, the UE may obtain synchronization with abase station. And furthermore, the UE needs to acquire systeminformation (SI) of the network.

FIG. 1 is a schematic diagram of a structure of a frame in an LTE/LTE-Asystem, and FIG. 2 is a schematic diagram of transmitting a PBCH or asynchronization signal in the LTE/LTE-A system. As shown in FIGS. 1 and2, the PBCH and/or the synchronization signal (SS, including a PSS/SSS)are(is) transmitted only once.

What is most important in SI is mater information block (MIB)information, which contains parameter information necessary for initialaccess to the cell, such as a system bandwidth, a size of a physicalhybrid automatic repeat request indicator channel (PHICH), and a systemframe number (SFN), etc. And the MIB information is carried by aphysical broadcast channel (PBCH).

Hence, the UE may obtain parameters necessary for demodulating aphysical downlink control channel (PDCCH), then may obtain systeminformation, such as SIB1, and SIB2, etc., and finally may performuplink random access. During the series of procedures, thesynchronization signal (including a PSS/SSS) and the PBCH are necessarysignals for the initial access.

In a fifth generation (5G) system or a new radio (NR) system nominatedaccording to the 3rd Generation Partnership Project (3GPP), bands higherthan 6 GHz will be used as carrier bands, and there is a need to improvereliability and provide coverage ranges. And in this case,synchronization signals and PBCHs necessary for the initial access needto be newly designed.

For instance, for high-frequency wireless communication, such ascommunication of a centimeter wave or a millimeter wave, attenuation ofradio waves is very severe, which will result in limitation ontransmission distances of signals. Therefore, the multi-antennatechnique will be adopted to increase coverage ranges of radio waves bymeans of the beamforming technique.

However, there exists a problem that a narrow beam means that the UE canreceive signals of relatively good strength in a direction to which thebeam directs, and quality of signals received by a UE out of a coveragerange of the beam is very poor. For data transmission, by designing ascheduling algorithm and with reference to analog beamforming, ordigital beamforming, or hybrid beamforming, a UE within a cell may beenabled to receive data information with guaranteed quality of service(QoS).

Difficulties exist in that for information that is received by all UEswithin the cell, such as the cell signals mentioned above, if theisotropic antenna transmission mode is still used, a cell radius will bevery small due to propagation features of the high-frequency waves. Andin this case, the beamforming mode must be used for such type ofsignals, and usually the analog beamforming may be used. However, it isnot limited thereto.

A subsequent problem is that in the beamforming, it may only be ensuredthat a UE within a certain angular range may receive wireless signals ofsufficient strengths and recover transmission information. Use of beamsweeping is an effective method if other angles need to be covered. Thatis, transmission is performed for a plurality of times at a plurality oftime instances or a plurality of time units at a time interval by usinga plurality of beams in a time-division manner, so that main lobes of aplurality of time-division beams may cover an expected area (such as asector, or a cell).

FIG. 3 is a schematic diagram of transmitting beams in a beamformingsystem. As shown in FIG. 3, a transmitter covers a sector of arotational angle 0 by a plurality of time-division steps; beams aretransmitted at a time instance or time unit to which each step in thesweeping corresponds, and the number of the steps may be fixed, or maybe configurable, or may be flexibly variable. Seen from a format fortransmitting signals, for example, the PSS in FIG. 1 occupies only onetime unit (such as an orthogonal frequency-division multiplexing (OFDM)symbol), while in the beam sweeping procedure in FIG. 3, the PSS needsto occupy a plurality of time units (symbols), and so does the SSS.

FIG. 4 is a schematic diagram of transmitting PBCHs or synchronizationsignals in the beamforming system, in which only a case of transmittinga plurality of PBCHs or synchronization signals is schematically shown.As shown in FIG. 4, at a time interval (such as a subframe), the PBCHsand/or synchronization signals need to be transmitted multiple times. Inthe LTE/LTE-A system, a position of a frame header may be extrapolatedby detecting positions of the PSSs and SSSs; however, when the beamsweeping manner is used, the UE is unable to estimate a beam, or a timeunit in a plurality of time units, or a time instance in a plurality oftime instances, to which a captured synchronization signal corresponds.Hence, it is unable to extrapolate a header position of a time interval(such as a frame or a subframe) and establish downlink synchronization.

Using a physical broadcast channel to carry timing information of a timeinterval in this disclosure shall be described below in detail.

In these embodiments, a transmitting device may a base station and areceiving device may be a UE. However, this disclosure is not limitedthereto, and the transmitting device and/or the receiving device mayalso be other network device(s). This disclosure shall be schematicallydescribed below by taking a base station and a UE as an example.

It should be noted that a concept or content of a signal or channel inthis disclosure may be similar to those in the LTE/LTE-A system.However, this disclosure is not limited thereto, it may be, for example,an enhanced signal or an enhance channel, or a newly defined signal orchannel. For example, the synchronization signals and physical broadcastchannels in this disclosure should not be simply deemed as beingequivalent to the PSSs/SSSs and PBCHs in the LTE/LTE-A system, andshould be understood in a broad sense.

Embodiment 1

The embodiments of this disclosure provide an information indicationmethod, applicable to a transmitting device (such as a base station).FIG. 5 is a schematic diagram of the information indication method ofthe embodiment of this disclosure. As shown in FIG. 5, the informationindication method includes:

501: a transmitting device transmits a plurality of physical broadcastchannels and a plurality of synchronization signals at a plurality oftime units or a plurality of time instances within a time interval, andeach of the physical broadcast channels carries timing information ofthe time interval.

In an embodiment, the plurality of physical broadcast channels and thecorresponding synchronization signals may be transmitted by thetransmitting device as formed beams. The formed beams are transmitted inidentical or different directions in a time-division manner; forexample, within the time interval, the formed beams are transmitted atfixed or configurable multiple time units or multiple time instances inidentical or different directions in a time-division manner. However,this disclosure is not limited thereto; for example, this disclosure isalso applicable to other scenarios than beamforming.

In an embodiment, each time interval may include a plurality of timeunits or a plurality of time instances, and all or part of the pluralityof time units or the plurality of time instances may transmit physicalbroadcast channels and/or synchronization signals, that is, the timeunits or time instances may correspond to the physical broadcastchannels and/or synchronization signals one to one, or not one to one.

For example, a time interval may include 10 time units, 5 of which maytransmit physical broadcast channels and synchronization signals,respectively.

Furthermore, a physical broadcast channel and a synchronization signalmay be transmitted at one time unit or time instance, or only a physicalbroadcast channel may be transmitted at one time unit or time instance,or only a synchronization signal may be transmitted at one time unit ortime instance, that is, the physical broadcast channels may correspondto the synchronization signals one to one, or not one to one.

In an embodiment, the numbers of the plurality of physical broadcastchannels and the plurality of synchronization signals transmitted at atime interval may be fixed; for example, a fixe value may be predefined(that is, it is statically kept constant). For example, N physicalbroadcast channels and M synchronization signals may be transmitted at atime interval; where, N and M may be identical value, or may bedifferent values.

Taking a beam sweeping procedure as an example, for example, the numbersof the plurality of physical broadcast channels and the plurality ofsynchronization signals transmitted at a TTI may be fixed, which meansthat the number of steps (or the number of beams) in the beam sweepingprocedure may be fixed. This may bring following advantages: forexample, making times of the UE in initial cell search and neighboringcell search controllable, and making an implementation complexity of thecell search controllable. Moreover, in a mechanism in which physicalbroadcast channels are used to carry timing information of a timeinterval, such fixed values may make signaling overhead very few.

Furthermore, the numbers of the plurality of physical broadcast channelsand the plurality of synchronization signals transmitted at a timeinterval may be configurable. For example, they may be set to be valuesthat are kept constant within a certain period of time (that is, theymay be semi-statically configured), or they may be set to be values thatvary according to instructions (that is, they may be dynamicallyconfigured).

In an embodiment, a time instance may refer to a time point. As eachsignal has a transmission time length, a time instance may mark acorresponding starting time point of transmission when a signal istransmitted, and a duration of the transmission may be determined by alength of the signal. A relationship between the signals and timeinstances is schematically described above; however, this disclosure isnot limited thereto, and reference may be made for particular contents.

In an embodiment, the time interval or the time unit may include any oneof the following time resource units: a symbol, a subframe, a frame, atransmission time interval. However, this disclosure is not limitedthereto. It should be noted that the time interval or the time unit inthe embodiments of this disclosure may have a hierarchical relationship;for example, a certain time interval may include time intervals or timeunits of smaller granularities, and a certain time unit may also includetime intervals or time units of smaller granularities.

FIG. 6 is a schematic diagram of transmitting physical broadcastchannels and/or synchronization signals in an embodiment of thisdisclosure. As shown in FIG. 6, the time interval may be a subframe, andthe time unit may be one or more symbols in the subframe. In otherwords, the signal is transmitted at a certain time instance. Eachsubframe may include a plurality of time units, and the beams varysequentially between different time units, or, in other words, thesignal is transmitted at a plurality of time instances (such as timeinstance a, time instance b, time instance c and time instance d shownin FIG. 6) by using a plurality of beams.

FIG. 7 is another schematic diagram of transmitting physical broadcastchannels and/or synchronization signals in the embodiment of thisdisclosure. As shown in FIG. 7, the time interval may be a frame, andthe time unit may be subframes in the frame, each subframe containing asingle physical broadcast channel and/or synchronization signal; andeach frame may contain a plurality of subframes, and beams varysequentially between different subframes. Likewise, it may be summarizedthat the signal is transmitted at a plurality of time instances (such astime instance a, time instance b, time instance c and time instance dshown in FIG. 7) by using a plurality of beams.

It should be noted that FIGS. 6 and 7 only schematically showtransmitting physical broadcast channels and/or synchronization signalsin the embodiment of this disclosure. However, this disclosure is notlimited thereto. And the time interval and time units in the embodimentof this disclosure only characterize an affiliation defined for theconvenience of explanation, and particular meanings of thereof are notlimited in this disclosure, and may be determined according to an actualscenario.

In an embodiment, for a physical broadcast channel, the timinginformation of the time interval may include: information on a positionof the time unit where the physical broadcast channel is located in thetime interval; or information on a transmission time instance of thephysical broadcast channel in the time interval; or information on atransmission order of the time unit where the physical broadcast channelis located in the time interval.

For example, for the physical broadcast channel transmitted on the thirdbeams at time instance c in FIG. 6, the broadcast channel includesinformation on a transmission order corresponding to “3”.

In an embodiment, each physical broadcast channel may correspond to asynchronization signal, there existing a predetermined temporalrelationship between the physical broadcast channel and thecorresponding synchronization signal. That is, a distance in the timedomain between the synchronization signal and the physical broadcastchannel is fixed. For example, similar to that in the LTE system, theyare neighboring in the time domain. However, this disclosure is notlimited thereto, and may also not neighboring.

In such a case, for a certain physical broadcast channel, the timinginformation of the time interval may further include: information on aposition of the time unit where the synchronization signal to which thephysical broadcast channel corresponds is located in the time interval;or information on transmission time instance of the synchronizationsignal to which the physical broadcast channel corresponds in the timeinterval; or information on a transmission order of the time unit wherethe synchronization signal to which the physical broadcast channelcorresponds is located in the time interval.

FIG. 8 is another schematic diagram of the information indication methodof the embodiment of this disclosure, in which the whole procedure shallbe described by taking a base station and a UE as an example. As shownin FIG. 8, the information indication method includes:

801: a base station transmits a plurality of physical broadcast channelsand a plurality of synchronization signals to a UE at a plurality oftime units within a time interval; each of the physical broadcastchannels carries timing information of the time interval.

802: the UE detects the synchronization signals transmitted by the basestation.

803: the UE receives corresponding physical broadcast channels accordingto the detected synchronization signals.

804: the UE obtains the timing information of the time interval carriedin the physical broadcast channel.

It should be noted that FIG. 8 only schematically describes theembodiment of this disclosure. However, this disclosure is not limitedthereto. For example, an order of execution of the steps may beappropriately adjusted; and furthermore, some other steps may be added,or some of these steps may be reduced. And appropriate modifications maybe made by those skilled in the art according to what is describedabove, without being limited to those contained in above figures.

In an embodiment, the physical broadcast channels and thesynchronization signals may have identical time intervals (such as anidentical transmission time interval and/or transmission direction). Forexample, the physical broadcast channels and the synchronization signalsmay correspond to each other one to one.

FIG. 9 is a schematic diagram of a plurality of physical broadcastchannels and a plurality of synchronization signals having identicaltime intervals in the embodiment of this disclosure. As shown in FIG. 9,the physical broadcast channels and synchronization signals may adopt anidentical beam sweeping procedure, and perform sweeping at a time domaininterval and a spatial domain interval in the identical beam sweeping.And optionally, a physical broadcast channel to which each beamcorresponds may be decoded on one's own. However, this disclosure is notlimited thereto.

FIG. 10 is a schematic diagram of using a predetermined temporalrelationship in the embodiment of this disclosure, in which it is shownthat the UE obtains the timing information of the time interval as areceiving device by synchronization detection. As shown in FIG. 10,after a detection operation (such as a coherent detection operation) ofsynchronization signals, a strongest synchronization signal may bepositioned by a highest correlation value, as shown in {circle around(1)} in FIG. 10.

As there exists the predetermined temporal relationship between thephysical broadcast channel and the corresponding synchronization signal,a position of a corresponding physical broadcast channel may beextrapolated from the position of the synchronization signal, as shownin {circle around (2)} in FIG. 10, so as to recover the timinginformation of the time interval carried by the physical broadcastchannel. A carrying manner may be explicit, or may be implicit, asdescribed later. And furthermore, a manner to which the beam sweepinghere corresponds may be either multi-beam continuous variation taking aduration of the physical broadcast channels and/or synchronizationsignals within the time interval (such as a subframe) shown in FIG. 6 asa unit, or multi-beam continuous variation taking a subframe as a unitwithin the time interval (such as a frame) shown in FIG. 7.

After obtaining the timing information of the time interval, theinformation on the position of the time unit where the physicalbroadcast channel is located within the time interval or the informationon the time instance when the physical broadcast channel is transmittedmay be extrapolated, as shown in {circle around (3)} in FIG. 10. Theninformation on an starting position of the time unit where thesynchronization signal is located relative to the time interval, orinformation on a time instance when the synchronization signal istransmitted, may be obtained, as shown in {circle around (4)} in FIG.10. Hence, the UE and the base station may be synchronized.

In an embodiment, the synchronization signal may employ a two-stagesynchronization signal structure like the PSS/SSS in the LTE system, ormay employ other new synchronization signal structures, such as aone-stage synchronization signal structure. Likewise, a synchronizationsequence used may be a sequence in consistence with that in the LTEsystem, or may be a new synchronization signal sequence.

For example, like the case in the LTE system, the synchronization signalmay occupy sixe resource blocks (RBs) near a center of a carrier, or maybe at other positions of the carrier. However, this disclosure is notlimited thereto, and a particular synchronization signal structure maybe determined according to an actual situation.

Likewise, the physical broadcast channel may follow a basic structure ofa PBCH in the LTE system, or may adopt a new structure, includingadopting different coding modulation schemes, occupied symbol lengths,and bandwidths, etc. And a relationship between a time-frequencyposition where the physical broadcast channel is located and a positionof the synchronization signal may be predefined.

In an embodiment, the plurality of physical broadcast channels and theplurality of synchronization signals may have different time intervals(such as different transmission time intervals and/or transmissiondirections).

FIG. 11 is a schematic diagram of a plurality of physical broadcastchannels and a plurality of synchronization signals having differenttime intervals in the embodiment of this disclosure. As shown in FIG.11, the beam sweeping time intervals used by the physical broadcastchannels and synchronization signals are different. However, only ifrelated information is predefined, the UE as the receiving device maysearch positions of corresponding physical broadcast channels in a blinddetection manner.

How the timing information of the time interval is carried by thephysical broadcast channel shall be described below.

In an embodiment, the timing information of the time interval may beexplicitly indicated by adding one or more bits to the physicalbroadcast channel. For example, information indicating a position of thetime unit where the physical broadcast channel is located within a laststage of time interval may be added to an MIB message.

FIG. 12 is a schematic diagram of the timing information of the timeinterval in an embodiment of this disclosure that is explicitly carried.As shown in FIG. 12, information on a position of a starting symbol (atime unit) occupied by the physical broadcast channel relative to aheader of the last stage of time interval (such as a subframe) may beadded to the MIB message.

For example, as to the schematic diagram of FIG. 10, there are fourphysical broadcast channels and synchronization signals within a timeinterval (such as a subframe). Assuming that one subframe includes 24symbols, each physical broadcast channel includes 4 symbols, and thereexists a physical broadcast channel every 6 symbols. Each physicalbroadcast channel is transmitted from a third symbol in the 6 symbols,the former two symbols are synchronization signals, and then 5 bits maybe added to the MIB information to denote the information on position.

Referring to the example shown in FIG. 10, for the second physicalbroadcast channel, corresponding MIB information is ‘01000’, denotingbeing spaced apart from the starting position of the time interval by 8symbols. Such a method in this example may be applied to the beamsweeping when the number of the beams is not fixed. When a length of asymbol is defined, this method may also express a starting time instanceof a beam to which the symbol corresponds, likewise, this method mayalso be used to indicate positions of synchronization signals.

If the number of the beams in the beam sweeping is fixed, that is, thenumbers of the physical broadcast channels and synchronization signalstransmitted within a time interval equivalently are fixed, informationindicating which time the physical broadcast channels andsynchronization signals are transmitted within a time interval may beattached to the MIB information.

FIG. 13 is another schematic diagram of the timing information of thetime interval that is explicitly carried in the embodiment of thisdisclosure. As shown in FIG. 13, as to the schematic diagram of FIG. 10,there are four physical broadcast channels and synchronization signalswithin a time interval (such as a subframe), and then introduction of 2bits may denote positions of the physical broadcast channels and/orsynchronization signals, i.e. information on a transmission order.Referring to the example shown in FIG. 10, for the second physicalbroadcast channel and/or synchronization signal, corresponding MIBinformation is ‘01’. Hence, overhead of attachment of signaling is veryfew, and time and complexity needed in the cell search by the UE arerelatively controllable.

FIGS. 12 and 13 may also correspond to the embodiment in FIG. 6 or 7. Asfor FIG. 6, within a time interval (such as a subframe), a plurality ofbeams vary continuously at a plurality of time units, an interval ofvariation of the beams here being a duration of the physical broadcastchannels and/or synchronization signals. And as for FIG. 7, within atime interval (such as a frame), a plurality of beams vary continuouslyat a plurality of time units (such as subframes), an interval ofvariation of the beams here being subframes, and directions of the beamswithin the subframes being fixed.

For example, for the example shown in FIG. 7, MIB information may beemployed for indication. And within a subframe, only a single physicalbroadcast channel and/or a single synchronization signal is (are)contained, a distance between which and the subframe header ispredefined. In this way, if the number of the beams in the beam sweepingis not fixed, assuming there are 10 subframes in a frame, 4 bits in theMIB may be used to indicate positions of subframes to which the beamscorrespond. And if the number of the beams in the beam sweeping isfixed, the above indication manner of transmission order may still beused. For example, corresponding to 4 beams, introduction of 2 bits maydenote information on a transmission order of the physical broadcastchannels and/or synchronization signals. And for the second beam (or thephysical broadcast channels and/or synchronization signals to which itcorresponds), corresponding MIB information is ‘01’.

In an embodiment, the timing information of the time interval may beimplicitly indicated by coding or modulation information of the physicalbroadcast channel. The coding or modulation information may be, forexample, a scrambling sequence for modulating the physical broadcastchannel, or a cyclic redundancy check (CRC) code, etc. However, thisdisclosure is not limited thereto.

For example, it may be carried on the physical broadcast channel byusing different scrambling sequences and/or adopting different CRC masksin a coding or modulation process.

Such a manner of carrying information is similar to the manner ofcarrying two bits of information of a lowest order of an SFN by a PBCHand carrying antenna port information in the LTE system, and a receiverneeds to perform detection by means of blind detection, with detailsbeing not going to be described herein any further.

In the above embodiments, the physical broadcast channel in each beamsweeping step may be decoded on its own, and carries information ontiming of the time interval. For example, it may indicate a position ofthe time unit where it is located within its higher stage of timeinterval.

The time unit here where the physical broadcast channel is located maycorrespond to a starting symbol position of the physical broadcastchannel, and its last stage of time interval may be a time-domainresource unit having a stage of subframe or a TTI higher than that of asymbol. Or, the time unit here where the physical broadcast channel islocated may be a position of a subframe or a TTI where the physicalbroadcast channel is located, and its last stage of time interval may bea time-domain resource unit having a stage of frame higher than that ofa subframe or a TTI. When a length of a symbol is fixed, this method mayalso indicate a starting time instance of the beam to which the symbolcorresponds.

In an embodiment, the position may correspond to an absolute timeposition of the starting symbol of the physical broadcast channel in thelast time interval (such as a subframe or a TTI), or correspond to arelative time distance between the starting symbol of the physicalbroadcast channel and a starting position of the last time interval, orcorrespond to a transmission instance message of the physical broadcastchannel within the time interval.

Furthermore, the position may correspond to an absolute time position ofthe subframe or TTI where the physical broadcast channel is located inthe last time interval (such as a frame), or correspond to a relativetime distance between the subframe or TTI where the physical broadcastchannel is located and the starting position (such as a frame header) ofthe last time interval (such as a frame).

Moreover, the timing information carried by the physical broadcastchannel may indicate which time of transmission within a time intervalto which the physical broadcast channel corresponds. For example, it mayindicate a time when the physical broadcast channel is transmittedwithin such a time interval as a subframe, or a TTI, etc., and mayindicate a time when such time interval as the subframe or TTI where thephysical broadcast channel is located is transmitted within the lasttime interval (such as a frame).

It can be seen from the above embodiments that a plurality of physicalbroadcast channels and a plurality of synchronization signals aretransmitted at a plurality of time units or a plurality of timeinstances within a time interval, and each of the physical broadcastchannels carries timing information of the time interval. Hence, even aplurality of physical broadcast channels and a plurality ofsynchronization signals are transmitted at a plurality of time units ora plurality of time instances within a time interval, the timinginformation of the time interval may be obtained with a simple structureand operation.

Embodiment 2

The timing information of the time interval shall be further describedin these embodiments on the basis of Embodiment 1, with contentsidentical to those in the Embodiment 1 being not going to be describedherein any further.

In an embodiment, the timing information of the time interval mayinclude: timing information of the physical broadcast channels in thetime interval, and/or timing information of the synchronization signalsin the time interval. However, this disclosure is not limited thereto.For example, time information on a starting position of the timeinterval may be directly contained in the physical broadcast channels.

The timing information of the time interval shall be described below indetail.

In an embodiment, the timing information of the time interval may beinformation related to the physical broadcast channels.

For example, in Embodiment 1, for a certain physical broadcast channel,the timing information of the time interval may include: information ona position of the time unit where the physical broadcast channel islocated in the time interval, or information on a transmission timeinstance of the physical broadcast channel in the time interval, orinformation on a transmission order of the time unit where the physicalbroadcast channel is located in the time interval.

In an embodiment, for a physical broadcast channel, the timinginformation of the time interval may also be: information on a relativetime of the time unit where the physical broadcast channel is located orthe transmission time instance of the physical broadcast channelrelative to a starting position of the time interval.

In an embodiment, the timing information of the time interval may theinformation related to the synchronization signals, that is, as thereexists a fixed temporal relationship between the physical broadcastchannel and the synchronization signal, the physical broadcast channelmay directly carry the timing information of the synchronization signal.

For example, for a physical broadcast channel, the timing information ofthe time interval may be: information on a position of the time unitwhere the synchronization signal to which the physical broadcast channelcorresponds is located in the time interval, or information ontransmission time instance of the synchronization signal to which thephysical broadcast channel corresponds in the time interval, orinformation on a transmission order of the time unit where thesynchronization signal to which the physical broadcast channelcorresponds is located in the time interval.

Or, the timing information of the time interval may also be: informationon a relative time of the time unit where the synchronization signal towhich the physical broadcast channel corresponds is located or thetransmission time instance of the synchronization signal relative to astarting position of the time interval.

In an embodiment, the timing information of the synchronization signalmay be explicitly or implicitly carried on the physical broadcastchannel. And the timing information of the time interval may beexplicitly indicated by adding one or more bits to the physicalbroadcast channel. For example, bits are added to the MIB message toindicate information on a position of a time unit where thesynchronization signal is located within a last stage of time interval,or bits are added to indicate information on a position of a timeinstance of the synchronization signal within the last stage of timeinterval.

Alternatively, the timing information of the time interval is implicitlyindicated by coding or modulation information of the physical broadcastchannel. For example, information on a position of a time unit where thesynchronization signal is located within a last stage of time intervalis implicitly indicated by CRC of the physical broadcast channel, orbits are added to indicate information on a position of a time instanceof the synchronization signal within the last stage of time interval.

Embodiment 3

The embodiments of this disclosure provide an information indicationmethod, which shall be described from a receiving device (such as a UE),with contents identical to those in Embodiments 1 and 2 being not goingto be described herein any further.

FIG. 14 is a schematic diagram of the information indication method ofthe embodiment of this disclosure. As shown in FIG. 14, the informationindication method includes:

Block 1401: a receiving device detects synchronization signalstransmitted by a transmitting device; the transmitting device transmitsa plurality of physical broadcast channels and a plurality ofsynchronization signals at a plurality of time units or a plurality oftime instances within a time interval, and each of the physicalbroadcast channels carries timing information of the time interval.

Block 1402: the receiving device receives corresponding physicalbroadcast channels according to detected synchronization signals.

Block 1403: the receiving device obtains the timing information of thetime interval carried by the physical broadcast channel.

In an embodiment, the numbers of the plurality of physical broadcastchannels and the plurality of synchronization signals transmitted at atime interval may be fixed, or may be configurable.

In an embodiment, the timing information of the time interval mayinclude: timing information of the physical broadcast channels in thetime interval, and/or timing information of the synchronization signalsin the time interval. However, this disclosure is not limited thereto,and it may also be other information indicating the timing of the timeinterval.

In an embodiment, for a certain physical broadcast channel, the timinginformation of the time interval may include: information on a positionof the time unit where the physical broadcast channel is located in thetime interval, or information on a transmission order of the time unitwhere the physical broadcast channel is located in the time interval, orinformation on transmission time instance of the physical broadcastchannel in the time interval, or information on a relative time of thetime unit where the physical broadcast channel is located or thetransmission time instance of the physical broadcast channel relative toa starting position of the time interval.

In an embodiment, each of the physical broadcast channels may correspondto one of the synchronization signals, and there exists a predeterminedtemporal relationship between the physical broadcast channel and thecorresponding synchronization signal. And the physical broadcastchannels and the synchronization signals may have identical transmissionintervals, or may have different transmission intervals. However, thisdisclosure is not limited thereto.

In an embodiment, for a certain physical broadcast channel, the timinginformation of the time interval may further include: information on aposition of the time unit where the synchronization signal to which thephysical broadcast channel corresponds is located in the time interval,or information on a transmission order of the time unit where thesynchronization signal to which the physical broadcast channelcorresponds is located in the time interval, or information ontransmission time instance of the synchronization signal to which thephysical broadcast channel corresponds in the time interval, orinformation on a relative time of the time unit where thesynchronization signal to which the physical broadcast channelcorresponds is located or the transmission time instance of thesynchronization signal relative to a starting position of the timeinterval.

In an embodiment, each time interval may include a plurality of timeunits or time instances; and the time interval or the time unit may beany one of the following time resource units: a symbol, a subframe, aframe, and a transmission time interval. However, this disclosure is notlimited thereto.

In an embodiment, the timing information of the time interval may beexplicitly indicated by adding one or more bits in the physicalbroadcast channel.

In an embodiment, the timing information of the time interval may beimplicitly indicated by coding or modulation information of the physicalbroadcast channel.

In an embodiment, the physical broadcast channel and the correspondingsynchronization signal are transmitted as formed beams by thetransmitting device. The formed beams in the time interval aretransmitted in identical or different directions by means of timedivision. For example, in the time interval, the formed beams aretransmitted at a plurality of fixed or configurable time units or timeinstances in identical or different directions by means of timedivision.

It can be seen from the above embodiment that a plurality of physicalbroadcast channels and a plurality of synchronization signals aretransmitted at a plurality of time units or a plurality of timeinstances within a time interval, and each of the physical broadcastchannels carries timing information of the time interval. Hence, even aplurality of physical broadcast channels and a plurality ofsynchronization signals are transmitted at a plurality of time units ora plurality of time instances within a time interval, the timinginformation of the time interval may be obtained with a simple structureand operation.

Embodiment 4

The embodiments of this disclosure provide an information indicationapparatus, configured in a transmitting device (such as a base station).The embodiments of this disclosure correspond to the informationindication method in Embodiment 1, with identical contents being notgoing to be described herein any further.

FIG. 15 is a schematic diagram of the information indication apparatusof the embodiment of this disclosure. As shown in FIG. 15, theinformation indication apparatus 1500 includes: an informationtransmitting portion 1501 configured to transmit a plurality of physicalbroadcast channels and a plurality of synchronization signals at aplurality of time units or a plurality of time instances within a timeinterval. Each of the physical broadcast channels carries timinginformation of the time interval.

In an embodiment, the numbers of the plurality of physical broadcastchannels and the plurality of synchronization signals transmitted at atime interval are fixed, or are configurable.

In an embodiment, the timing information of the time interval mayinclude: timing information of the physical broadcast channels in thetime interval, and/or, timing information of the synchronization signalsin the time interval. However, this disclosure is not limited thereto,and it may also be other information indicating the timing of the timeinterval.

In an embodiment, for a certain physical broadcast channel, the timinginformation of the time interval may include: information on a positionof the time unit where the physical broadcast channel is located in thetime interval, or information on a transmission order of the time unitwhere the physical broadcast channel is located in the time interval, orinformation on a transmission time instance of the physical broadcastchannel in the time interval, or information on a relative time of thetime unit where the physical broadcast channel is located or thetransmission time instance of the physical broadcast channel relative toa starting position of the time interval.

In an embodiment, each of the physical broadcast channels may correspondto one of the synchronization signals, there existing a predeterminedtemporal relationship between the physical broadcast channel and thecorresponding synchronization signal. And the physical broadcastchannels and the synchronization signals may have identical transmissionintervals, or may have different transmission intervals. However, thisdisclosure is not limited thereto.

In an embodiment, for a physical broadcast channel, the timinginformation of the time interval may further include: information on aposition of the time unit where the synchronization signal to which thephysical broadcast channel corresponds is located in the time interval,or information on a transmission order of the time unit where thesynchronization signal to which the physical broadcast channelcorresponds is located in the time interval, or information ontransmission time instance of the synchronization signal to which thephysical broadcast channel corresponds in the time interval, orinformation on a relative time of the time unit where thesynchronization signal to which the physical broadcast channelcorresponds is located or the transmission time instance of thesynchronization signal relative to a starting position of the timeinterval.

In an embodiment, each time interval may include a plurality of timeunits or time instances; and the time interval or the time unit may beany one of the following time resource units: a symbol, a subframe, aframe, and a transmission time interval.

In an embodiment, the timing information of the time interval may beexplicitly indicated by adding one or more bits to the physicalbroadcast channel.

In an embodiment, the timing information of the time interval may beimplicitly indicated by coding or modulation information of the physicalbroadcast channel.

In an embodiment, the physical broadcast channel and the correspondingsynchronization signal may be transmitted as formed beams by thetransmitting device; the formed beams may be transmitted in identical ordifferent directions by means of time division. For example, in the timeinterval, the formed beams are transmitted at a plurality of fixed orconfigurable time units or time instances in identical or differentdirections by means of time division.

It can be seen from the above embodiment that a plurality of physicalbroadcast channels and a plurality of synchronization signals aretransmitted at a plurality of time units or a plurality of timeinstances within a time interval, and each of the physical broadcastchannels carries timing information of the time interval. Hence, even aplurality of physical broadcast channels and a plurality ofsynchronization signals are transmitted at a plurality of time units ora plurality of time instances within a time interval, the timinginformation of the time interval may be obtained with a simple structureand operation.

Embodiment 5

The embodiments of this disclosure provide an information indicationapparatus, configured in a receiving device (such as a UE). Theembodiments of this disclosure correspond to the information indicationmethod in Embodiment 2, with identical contents being not going to bedescribed herein any further.

FIG. 16 is a schematic diagram of the information indication apparatusof the embodiment of this disclosure. As shown in FIG. 16, theinformation indication apparatus 1600 includes:

a synchronization signal detecting portion 1601 configured to detectsynchronization signals transmitted by a transmitting device; wherein,the transmitting device transmits a plurality of physical broadcastchannels and a plurality of synchronization signals at a plurality oftime units or a plurality of time instances within a time interval, andeach of the physical broadcast channels carries timing information ofthe time interval;

an information receiving portion 1602 configured to receivecorresponding physical broadcast channels according to detectedsynchronization signals; and

a timing obtaining portion 1603 configured to obtain the timinginformation of the time interval carried by the physical broadcastchannel.

In an embodiment, the numbers of the plurality of physical broadcastchannels and the plurality of synchronization signals transmitted at atime interval are fixed, or are configurable.

In an embodiment, the timing information of the time interval mayinclude: timing information of the physical broadcast channels in thetime interval, and/or timing information of the synchronization signalsin the time interval. However, this disclosure is not limited thereto,and it may also be other information indicating the timing of the timeinterval.

In an embodiment, for a certain physical broadcast channel, the timinginformation of the time interval may include: information on a positionof the time unit where the physical broadcast channel is located in thetime interval, or information on a transmission order of the time unitwhere the physical broadcast channel is located in the time interval, orinformation on transmission time instance of the physical broadcastchannel in the time interval, or information on a relative time of thetime unit where the physical broadcast channel is located or thetransmission time instance of the physical broadcast channel relative toa starting position of the time interval.

In an embodiment, each of the physical broadcast channels may correspondto one of the synchronization signals, there existing a predeterminedtemporal relationship between the physical broadcast channel and thecorresponding synchronization signal. And the physical broadcastchannels and the synchronization signals may have identical transmissionintervals, or may have different transmission intervals; however, thisdisclosure is not limited thereto.

In an embodiment, for a physical broadcast channel, the timinginformation of the time interval may further include: information on aposition of the time unit where the synchronization signal to which thephysical broadcast channel corresponds is located in the time interval,or information on a transmission order of the time unit where thesynchronization signal to which the physical broadcast channelcorresponds is located in the time interval, or information ontransmission time instance of the synchronization signal to which thephysical broadcast channel corresponds in the time interval, orinformation on a relative time of the time unit where thesynchronization signal to which the physical broadcast channelcorresponds is located or the transmission time instance of thesynchronization signal relative to a starting position of the timeinterval.

In an embodiment, each time interval may include the time units or timeinstances; and the time interval or the time unit may be any one of thefollowing time resource units: a symbol, a subframe, a frame, and atransmission time interval. However, this disclosure is not limitedthereto.

In an embodiment, the timing information of the time interval may beexplicitly indicated by adding one or more bits in the physicalbroadcast channel.

In an embodiment, the timing information of the time interval may beimplicitly indicated by coding or modulation information of the physicalbroadcast channel.

In an embodiment, the physical broadcast channel and the correspondingsynchronization signal may be transmitted as formed beams by thetransmitting device; the formed beams may be transmitted in identical ordifferent directions by means of time division. For example, in the timeinterval, the formed beams are transmitted at a plurality of fixed orconfigurable time units or time instances in identical or differentdirections by means of time division.

It can be seen from the above embodiment that a plurality of physicalbroadcast channels and a plurality of synchronization signals aretransmitted at a plurality of time units or a plurality of timeinstances within a time interval, and each of the physical broadcastchannels carries timing information of the time interval. Hence, even aplurality of physical broadcast channels and a plurality ofsynchronization signals are transmitted at a plurality of time units ora plurality of time instances within a time interval, the timinginformation of the time interval may be obtained with a simple structureand operation.

Embodiment 6

The embodiments of this disclosure provide a communication system, withcontents identical to Embodiments 1-5 being not going to be describedherein any further. The communication system may include:

a transmitting device configured to transmit a plurality of physicalbroadcast channels and a plurality of synchronization signals at aplurality of time units or a plurality of time instances within a timeinterval; wherein, each of the physical broadcast channels carriestiming information of the time interval; and

a receiving device configured to detect the synchronization signalstransmitted by the transmitter end, receive corresponding physicalbroadcast channels according to detected synchronization signals, andobtain the timing information of the time interval carried by thephysical broadcast channel.

In an embodiment, the transmitting device may be a base station and thereceiving device may be a UE. However, this embodiment is not limitedthereto.

FIG. 17 is a schematic diagram of the communication system of theembodiment of this disclosure, in which a case where the transmittingdevice is a base station and the receiving device is a UE is shown. Asshown in FIG. 17, the communication system 1700 may include a basestation 1701 and a UE 1702. The base station 1701 may be configured withthe information indication apparatus 1500 described in Embodiment 3, andthe UE 1702 may be configured with the information indication apparatus1600 described in Embodiment 4.

The embodiments of this disclosure further provide a transmittingdevice, such as a base station However, this disclosure is not limitedthereto, and it may also be other network devices. Following descriptionshall be given by taking a base station as an example.

FIG. 18 is a schematic diagram of a structure of the base station of theembodiment of this disclosure. As shown in FIG. 18, the base station1800 may include a central processing unit (CPU) 200 and a memory 210,the memory 210 being coupled to the central processing unit 200. Thememory 210 may store various data, and furthermore, it may store aprogram for information processing, and execute the program undercontrol of the central processing unit 200. And the central processingunit 200 may be configured to carry out the information indicationmethod described in Embodiment 1.

For example, the central processing unit 200 may be configured toperform following control: transmit a plurality of physical broadcastchannels and a plurality of synchronization signals at a plurality oftime units or a plurality of time instances within a time interval; eachof the physical broadcast channels carries timing information of thetime interval.

Furthermore, as shown in FIG. 18, the base station 1800 may include atransceiver 220, and an antenna 230, etc. Functions of the abovecomponents are similar to those in the relevant art, and shall not bedescribed herein any further. It should be noted that the base station1800 does not necessarily include all the parts shown in FIG. 18, andfurthermore, the base station 1800 may include parts not shown in FIG.18, and the relevant art may be referred to.

The embodiments of this disclosure further provide a receiving device,such as a UE; however, this disclosure is not limited thereto, and itmay also be other network devices. Following description shall be givenby taking a UE as an example.

FIG. 19 is a schematic diagram of the UE of the embodiment of thisdisclosure. As shown in FIG. 19, the UE 1900 may include a centralprocessing unit 100 and a memory 140, the memory 140 being coupled tothe central processing unit 100. It should be noted that this figure isillustrative only, and other types of structures may also be used, so asto supplement or replace this structure and achieve a telecommunicationsfunction or other functions. The central processing unit 100 may beconfigured to carry out the information indication method described inEmbodiment 2.

For example, the central processing unit 100 may be configured toperform following control: detect synchronization signals transmitted bya transmitting device; receive corresponding physical broadcast channelsaccording to detected synchronization signals; and obtain the timinginformation of the time interval carried by the physical broadcastchannel.

As shown in FIG. 19, the UE 1900 may further include a communicationmodule 110, an input unit 120, a display 160 and a power supply 170.Functions of the above components are similar to those in the relevantart, and shall not be described herein any further. It should be notedthat the UE 1900 does not necessarily include all the parts shown inFIG. 19, and the above components are not necessary; and furthermore,the UE 1900 may include parts not shown in FIG. 19, and the relevant artmay be referred to.

An embodiment of the present disclosure provides a computer readableprogram code, which, when executed in an information indicationapparatus or a transmitting device, will cause the informationindication apparatus or the transmitting device to carry out theinformation indication method as described in Embodiment 1.

An embodiment of the present disclosure provides a computer readablemedium, including a computer readable program code, which will cause aninformation indication apparatus or a transmitting device to carry outthe information indication method as described in Embodiment 1.

An embodiment of the present disclosure provides a computer readableprogram code, which, when executed in an information indicationapparatus or a receiving device, will cause the information indicationapparatus or the receiving device to carry out the informationindication method as described in Embodiment 2.

An embodiment of the present disclosure provides a computer readablemedium, including a computer readable program code, which will cause aninformation indication apparatus or a receiving device to carry out theinformation indication method as described in Embodiment 2.

The above apparatuses of the present disclosure may be implemented byhardware, or by hardware in combination with software. The presentdisclosure relates to such a computer-readable program that when theprogram is executed by a logic device, the logic device is enabled tocarry out the apparatus or components as described above, or to carryout the methods or steps as described above. The present disclosure alsorelates to a storage medium for storing the above program, such as ahard disk, a floppy disk, a CD, a DVD, and a flash memory, etc.

The method/apparatus described with reference to the embodiments of thisdisclosure may be directly embodied as hardware, software modulesexecuted by a processor, or a combination thereof. For example, one ormore functional block diagrams and/or one or more combinations of thefunctional block diagrams shown in FIG. 15 may either correspond tosoftware modules of procedures of a computer program, or correspond tohardware modules. Such software modules may respectively correspond tothe steps shown in FIG. 5. And the hardware module, for example, may becarried out by firming the soft modules by using a field programmablegate array (FPGA).

The soft modules may be located in an RAM, a flash memory, an ROM, anEPROM, and EEPROM, a register, a hard disc, a floppy disc, a CD-ROM, orany memory medium in other forms known in the art. A memory medium maybe coupled to a processor, so that the processor may be able to readinformation from the memory medium, and write information into thememory medium; or the memory medium may be a component of the processor.The processor and the memory medium may be located in an ASIC. The softmodules may be stored in a memory of a mobile terminal, and may also bestored in a memory card of a pluggable mobile terminal. For example, ifequipment (such as a mobile terminal) employs an MEGA-SIM card of arelatively large capacity or a flash memory device of a large capacity,the soft modules may be stored in the MEGA-SIM card or the flash memorydevice of a large capacity.

One or more functional blocks and/or one or more combinations of thefunctional blocks in the accompanying drawings may be realized as auniversal processor, a digital signal processor (DSP), anapplication-specific integrated circuit (ASIC), a field programmablegate array (FPGA) or other programmable logic devices, discrete gate ortransistor logic devices, discrete hardware component or any appropriatecombinations thereof carrying out the functions described in thisapplication. And the one or more functional block diagrams and/or one ormore combinations of the functional block diagrams in the accompanyingdrawings may also be realized as a combination of computing equipment,such as a combination of a DSP and a microprocessor, multipleprocessors, one or more microprocessors in communication combinationwith a DSP, or any other such configuration.

This disclosure is described above with reference to particularembodiments. However, it should be understood by those skilled in theart that such a description is illustrative only, and not intended tolimit the protection scope of the present disclosure. Various variantsand modifications may be made by those skilled in the art according tothe principle of the present disclosure, and such variants andmodifications fall within the scope of the present disclosure.

What is claimed is:
 1. An information indication apparatus, configuredin a transmitting device, the information indication apparatuscomprising: a memory that stores a plurality of instructions; and aprocessor coupled to the memory and configured to execute the pluralityof instructions to: transmit a plurality of physical broadcast channelsand a plurality of synchronization signals at a plurality of time unitswithin a time interval; wherein, each of the physical broadcast channelsindicates timing information, the timing information corresponding to aposition in time, each of the physical broadcast channels is one to onecorresponding to one of the synchronization signals, and there is apredetermined temporal relationship between the physical broadcastchannel and the corresponding synchronization signal, wherein the timeinterval is a half frame, the timing information comprises: a positionof the time unit where the physical broadcast channel is located in thetime interval; wherein the timing information is explicitly indicated byone or more bits in payload of the physical broadcast channel; and thetiming information in the timing information in the physical broadcastchannels within the time unit are the same.
 2. The informationindication apparatus according to claim 1, wherein the number of theplurality of physical broadcast channels and the plurality ofsynchronization signals transmitted at a time interval are configurable.3. The information indication apparatus according to claim 1, whereinfor the given physical broadcast channel, the timing information alsocomprises at least one of: a transmission time instance of the physicalbroadcast channel in the time interval; and a relative time of the timeunit where the physical broadcast channel is located or the transmissiontime instance of the physical broadcast channel relative to a startingposition of the time interval.
 4. The information indication apparatusaccording to claim 1, wherein for the given physical broadcast channel,the timing information also comprises at least one of: a position of thetime unit where the synchronization signal to which the physicalbroadcast channel corresponds is located in the time interval; and atransmission order of the time unit where the synchronization signal towhich the physical broadcast channel corresponds is located in the timeinterval; and a transmission time instance of the synchronization signalto which the physical broadcast channel corresponds in the timeinterval; and a relative time of the time unit where the synchronizationsignal to which the physical broadcast channel corresponds is located orthe transmission time instance of the synchronization signal relative toa starting position of the time interval.
 5. The information indicationapparatus according to claim 1, wherein each time interval comprises aplurality of time units; and each time unit comprises any one of thefollowing time resource units: a symbol, a subframe, a frame, and atransmission time interval.
 6. The information indication apparatusaccording to claim 1, wherein the physical broadcast channel and thecorresponding synchronization signal are transmitted as formed beams bythe transmitting device; and the formed beams in the time interval aretransmitted in identical or different directions at a plurality ofconfigurable time units or time instances by means of time division. 7.The information indication apparatus according to claim 1, wherein eachof the plurality of the time units comprise the plurality of timeinstances; wherein the time units correspond with a range of time andthe time instances correspond with a discrete time.
 8. The informationindication apparatus according to claim 1, wherein the synchronizationsignal comprises a primary synchronization signal and a secondarysynchronization signal.
 9. An information indication apparatus,configured in a receiving device, the information indication apparatuscomprising: a memory that stores a plurality of instructions; aprocessor coupled to the memory and configured to execute the pluralityof instructions to: detect synchronization signals transmitted by atransmitting device; wherein, the transmitting device transmits aplurality of physical broadcast channels and a plurality ofsynchronization signals at a plurality of time units within a timeinterval, and each of the physical broadcast channels indicate timinginformation, the timing information corresponding to a position in time;receive corresponding physical broadcast channels according to detectedsynchronization signals; and obtain the timing information carried bythe physical broadcast channels, wherein each of the physical broadcastchannels is one to one corresponding to one of the synchronizationsignals, and there is a predetermined temporal relationship between thephysical broadcast channel and the corresponding synchronization signal,wherein the time interval is a half frame, the timing informationcomprises: a position of the time unit where the physical broadcastchannel is located in the time interval; wherein the timing informationis explicitly indicated by one or more bits in payload of the physicalbroadcast channel; and the timing information in the physical broadcastchannels within the time unit are the same.
 10. The informationindication apparatus according to claim 9, wherein the number of theplurality of physical broadcast channels and the plurality ofsynchronization signals transmitted at a time interval are configurable.11. The information indication apparatus according to claim 9, whereinfor the given physical broadcast channel, the timing information alsocomprises at least one of: a transmission time instance of the physicalbroadcast channel in the time interval; and a relative time of the timeunit where the physical broadcast channel is located or the transmissiontime instance of the physical broadcast channel relative to a startingposition of the time interval.
 12. The information indication apparatusaccording to claim 9, wherein for a certain physical broadcast channel,the timing information comprises at least one of: a position of the timeunit where the synchronization signal to which the physical broadcastchannel corresponds is located in the time interval; and a transmissionorder of the time unit where the synchronization signal to which thephysical broadcast channel corresponds is located in the time interval;and a transmission time instance of the synchronization signal to whichthe physical broadcast channel corresponds in the time interval; andinformation on a relative time of the time unit where thesynchronization signal to which the physical broadcast channelcorresponds is located or the transmission time instance of thesynchronization signal relative to a starting position of the timeinterval.
 13. The information indication apparatus according to claim 9,wherein each time interval comprises a plurality of time units; and eachtime unit is any one of the following time resource units: a symbol, asubframe, a frame, and a transmission time interval.
 14. The informationindication apparatus according to claim 9, wherein the physicalbroadcast channel and the corresponding synchronization signal aretransmitted as formed beams by the transmitting device; and the formedbeams in the time interval are transmitted in identical or differentdirections at a plurality of configurable time units or time instancesby means of time division.
 15. The information indication apparatusaccording to claim 9, wherein each of the plurality of the time unitscomprise the plurality of time instances wherein the time unitscorrespond with a range of time and the time instances correspond with adiscrete time.
 16. The information indication apparatus according toclaim 9, wherein a synchronization signal of the plurality ofsynchronization signals comprises a primary synchronization signal and asecondary synchronization signal.
 17. A communication system,comprising: a transmitting device configured to transmit a plurality ofphysical broadcast channels and a plurality of synchronization signalsat a plurality of time units within a time interval; wherein, each ofthe physical broadcast channels indicate timing information, the timinginformation corresponding to a position in time, wherein the timeinterval is a half frame, the timing information comprises: a positionof the time unit where the physical broadcast channel is located in thetime interval; wherein the timing information is explicitly indicated byone or more bits in payload of the physical broadcast channel; and thetiming information in the physical broadcast channels in the time unitare the same: and a receiving device configured to detect thetransmitted synchronization signals, receive corresponding physicalbroadcast channels according to detected synchronization signals, andobtain the timing information carried by the physical broadcastchannels, wherein each of the physical broadcast channels is one to onecorresponding to one of the synchronization signals, and there is apredetermined temporal relationship between the physical broadcastchannel and the corresponding synchronization signal.
 18. Thecommunication system according to claim 17, wherein the transmittingdevice is a base station and the receiving device is a user equipment.